Mr. J. ^Y. Shoebotham's Notes on Collembola. 433 



10. Genus CHONDRACHOHtJTES, WahlgT. 



[The genus Chondraclwnctes of Wahlgren has 

 not beeu previously recorded from the British 

 Isles, but it iibvertheless occurs there, for I took 

 specimens at Berkhamsted, Herts, in 1910, but 

 have not yet described them.] 



Tribe A c h o r u t i n i, C. B, 



11. Genus Achorutes, Tempi., C. B. 



— Keanura, MacG. 



III. Family Onychiuridae (Lbk., C. B.). 



12. Genus Onychiurtjs, Gerv., C. B. 



13. Genus Protaphorura, Abslu., C. B. 



14. Genus Tullbergia, Lbk. 



Section ENTOMOBRYOMOEPHA, C. B. 

 IV. Family Isotomidae (Schffr., C. B.). 

 Subfamily IsOTOMlXu3£, Schffi". 



15. Genus Isotoma, Boml., C. B.. 



16. Genus Agrenia, C. B. 



17. Genus Proisotoma, C.B. 



17 a. Genus ? Archisotoma, Linnaniemi. 



[Linnaniemi has proposed the genus Archi- 

 sotoma for the reception of Proisotoma besseUsi 

 (=P. spitzbergenensis, Lbk.), but as I have neither 

 my specimens of bessel/si nor Licnaniemi's descrip- 

 tion by me at the moment, I cannot say whether 

 it should be regarded as a separate genus ol- as a 

 subgenus of Proisotoma.'] 



18. Genus Anurophorus, Nic. 



19. Genus Folsomia, Willem. 



20. Genus Tetracanthella, Schtt. 



21. Genus Isotomodes, Axels-Linn. 



22. Genus Isotomurus, C. B. 



23. Genus Oncopodura, Carl & Lebed. 



Subfamily Actaletin^je, 0. B. 



[The subfamily Adaletina is not represented in the 

 British Isles.] 



